Welp, I guess we're going to have to pack up the modern world and go home then. Because many of the major advances in science thus far have been widely rejected by credentialed people at first only to eventually be proven correct.
First Semmelweis, then Pasteur:
http://en.wikipedia.org/wiki/Ignaz_Semmelweis#Conflict_with_...
http://en.wikipedia.org/wiki/Louis_Pasteur
Copernicus and Galileo vs a lot of other people:
http://en.wikipedia.org/wiki/Galileo_Galilei#Controversy_ove...
http://en.wikipedia.org/wiki/Nicolaus_Copernicus
Einstein and relativity:
http://en.wikipedia.org/wiki/Criticism_of_the_theory_of_rela...
I could do this for days if you'd like. Credentials are worth something of course, but credentials don't have metaphysical powers that prevent a person from being wrong once they have their credentials.
EDIT:
That's not to say I necessarily believe that these folks are correct and Dawkins is wrong. Just that the credentials don't mean as much as people think they should. It's not like getting a PhD prevents you from ever having a bias ever again. It'd be great if it was true, but it's not.